Packing-ring for pumps



(No Model.)

W. E; KARNS.

PACKING RING FOR PUMPS. No. 278,557. Patented May 29,1883.

wh /5m WITNESSES INVENTOR.

rfldfdhzm ATTORNEYS UNITED STATES PATENT OFFICE.

WILLIAM E. KAnns, or PARKERS LANDING, PENNSYLVANIA.

PACKING-RING FOR PUMPS.

SPECIFICATION forming part of Letters Patent No. 278,557, dated May 29, 11883.

Application filed February 10, 1883.

Rings for Pumps; and I do hereby declare that the following is a full, clear, and exact description of theinvention, which will enable others skilled in the art to whichlit appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a diametrical sectional view of my improved packing-ring for pump-pistons. Fig. 2is a perspectiveview of the inner clampin g-ring detached; and Fig. 3 is a perspective view of the complete packing-ring, seen from the under side.

Similar letters of reference indicate corresponding parts in all the figures.

In packing pump-pistons experience has demonstrated that where leather or rubber packingis used it is apt to be injured in pumps used for pumping hot liquids or salt-water, so as to be soon made unserviceable-in the one case by the burning or rottingof the packin the detailed construction of a packing-ring consisting ofa body of duck or similar material, which is clamped between two rings in such a manner as to leave a projecting rim of the selvage free, substantially as hereinafter more fully described and claimed.

In the accompanying dra wings, the letter A denotes the outside metallic ring, between which and the inner ring, B, the packing is clamped. This packing consists of a strip of duck or textile fabric of a similar nature, 0, of such a length that it may be rolled up or coiled to form several layers, as shown at a, b, and c in Fig. 1, between the two rings A and B; The packing-strip is cut of such a (No model-l width that the selvage G will project beyond I the lower rim of the clamping-rings, the increased thickness of the material at the selvage forming a packing of several layers between the pump-piston and pump-barrel in which the piston works. The outer ring, A,

is rounded at the top to form a head, A, the

sharp inner edge of which bites the fabric 0, which at its upper end overlaps the bead B of the inner ring, B. This in itself forms a good fastening for the packing between the two rings; but to still better hold it in place and prevent any possibility of its working loose l crimp the inner ring, as shown at D in Fig. 2*, so as to form ribs or ridges which bite into the fabric between the two rings. For this purpose the inner ring, B, is made flaring, as shown in Fig. 2, and of ductile metal,

as, if made cylindrical, like the outer ring,'it would be reduced in size by the process of forming the crimps or ribs D, so as not to hold or bite the packing as firmly as is desirable.

I do not confine myself "to anyparticular means for fastening this ring upon the piston or plunger, as this may be doneby bolting by means of clamping-screws, keys, or wedges, and in many other ways; but,

Having thus described my invention, I claim and desire to secure by Letters Patent of the United State A packin g-rin g for pump'pistons, consisting of the outer cylindrical ring or sleeve, A, pack- .ing G, oftextilefabric, having a projecting selvage-rim, O, of several thicknesses, and flaring inner ring, B, crimped to form ribs or ridges D, biting sidewise into that part of the packing which is clamped between the two rings, substantially as and for the purpose herein shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

WILLIAM ELIJIO'IT KARNS.

Witnesses:

J. S. COOPER, S. G. Moaaow. 

